During the 1970s and 1980s, Heckler and Koch were engaged in multiple parallel lines of rifle development, from the hubristically ambitious G11 to the G41, a 5.56mm roller retarded blowback rifle that married NATO standards such as AR-15 magazines and compatibility with NATO ammunition to the existing HK33 rifle.
The G41 only achieved very limited sales, and few specialized variants were ever produced even at the prototype level. However, TSC Machine has realized a hypothetical “G41C” variant in the style of H&K short-barreled carbine variants:
TSC Machine is a custom gunmaker specializing in modifications to H&K weapons, including NFA items. Besides the G41C, some their most interesting projects include a modernized FNC and a reproduction of the XM262 US Army SAW trials weapon.